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JavaScript DOM Scripting By Example Editing and Filtering Names Fix DOM Manipulation Code

Andrew Robida
Andrew Robida
15,296 Points
Posted by Andrew Robida
Andrew Robida
15,296 Points

Stuck anyone know what I am doing wrong here?

I do not understand what I need to write

app.js 
const laws = document.getElementsByTagName('li');
const indexText = document.getElementById('boldIndex');
const button = document.getElementById('embolden');

button.addEventListener('click', (e) => {
    const index = parseInt(indexText.value, 10);

    for (let i = 0; i < laws.length; i += 1) {
       let law = laws[i];

       // replace 'false' with a correct test condition on the line below
       if (law.style.fontWeight='none') {

           law.style.fontWeight = 'bold';
       } else {
           law.style.fontWeight = 'normal';
       }
    }
});
index.html 
<!DOCTYPE html>
<html>
<head>
  <title>Newton's Laws</title>
</head>
<body>
  <h1>Newton's Laws of Motion</h1>
  <ul>
    <li>An object in motion tends to stay in motion, unless acted on by an outside force.</li>
    <li>Acceleration is dependent on the forces acting upon an object and the mass of the object.</li>
    <li>For every action, there is an equal and opposite reaction.</li>
  </ul>
  <input type="text" id="boldIndex">
  <button id="embolden">Embolden</button>
  <script src="app.js"></script>
</body>
</html>

1 Answer

Steven Parker
Steven Parker
229,657 Points
Steven Parker
Steven Parker
229,657 Points

You will want to compare indexes.

First off, you currently have an assignment (single "=") instead of a comparison (double "==") in your test. But you don't want to just convert that into a test.

To determine what style to apply, you'll want to compare the index number of the item (the loop index) with the value that was supplied in the input box.

Andrew Robida
Andrew Robida
15,296 Points
Andrew Robida
Andrew Robida
15,296 Points

some of these are so simple you just overlook it thanks for giving me some prespective